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Self Assessment tax returns - deadlines, who must send a tax return, penalties, corrections and returns for someone who has died.
Check if your company’s or group’s interest deductions for Corporation Tax will be restricted, and if you need to send a Corporate Interest Restriction return.
Your accounting period for Corporation Tax and Company Tax returns - financial years and accounting periods, changing accounting periods
Your company's financial year can run for more or less than 12 months - find out how to change it
Use this service to submit a return for Digital Services Tax, if you're registered for the tax.
Use form CT600 (Short) (2007) Version 2 to file your return if you are a small business, club or company with straightforward tax affairs.
How to manage your annual accounts, Company Tax Returns and Corporation Tax if your non-trading or dormant limited company starts trading again.
Use the postal form (SA700) to file a tax return for a non-resident company.
How changes and issues may affect the way you should file your Company Tax Return.
Use form CT600 (2007) Version 2 to file a Company Tax Return for accounting periods ending on or after 1 April 2004, up to and including 31 March 2008.
Use form CT600 (Short) (2008) Version 2 if you are a small business, club or company with straightforward tax affairs.
Check when you need to notify HMRC in advance about an R&D Corporation Tax relief claim, the information you will need to provide and how to send it.
Directors are required to submit records for tax, VAT and company information.
Use this guidance to create your products if you're a HMRC software developer or substitute form producer.
Find out about producing Company Tax Returns, mandatory online filing and legal exemptions at the end of a company's life.
How to work out and claim Corporation Tax relief on trading losses.
Find out about tax reliefs and allowances available from HMRC if you run a business, employ people or are self-employed.
How to file company information - including directors, registered office and shareholders in your confirmation statement (previously AR01 annual return)
Use form WT1 if you've been unable to send your Company Tax Return online.
How to ask Companies House to extend your filing deadline if an unplanned event stops you filing your accounts.
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